Parts

The Shimano Ultegra FC-R8100 12 speed chainrings are the perfect replacement for worn or damaged chainringsHOLLOWGLIDE, hollow outer chainring technology, giving vast improvements in rigidity and increased weight savings, whilst also removing outer chainring flex, hugely improving shift performance ..

The HollowTech II 12-speed Ultegra chainset offers an ideal balance of light weight and stiffness, making it the perfect choice for both enthusiast and competitive ridersHollowGlide hollow outer chainring gives vast improvements in rigidity by virtually removing outer chainring flex and hugely impro..

FC-R8100 Ultegra left hand crank arm unit, 160 mm is product number 2 in the attached imageGenuine Shimano replacement part..

FC-R8100 Ultegra left hand crank arm unit, 165 mm is product number 2 in the attached imageGenuine Shimano replacement part..

FC-R8100 Ultegra left hand crank arm unit, 170 mm is product number 2 in the attached imageGenuine Shimano replacement part..

FC-R8100 Ultegra left hand crank arm unit, 172.5 mm is product number 2 in the attached imageGenuine Shimano replacement part..

FC-R8100-P left hand crank arm unit, 160 mm is product number 1 in the attached imageGenuine Shimano replacement part..

FC-R8100-P left hand crank arm unit, 165 mm is product number 1 in the attached imageGenuine Shimano replacement part..

FC-R8100-P left hand crank arm unit, 170 mm is product number 1 in the attached imageGenuine Shimano replacement part..

FC-R8100-P left hand crank arm unit, 175 mm is product number 1 in the attached imageGenuine Shimano replacement part..